Global Patent Index - EP 2157065 A3

EP 2157065 A3 20111026 - Method for producing a polycrystalline transparent ceramic

Title (en)

Method for producing a polycrystalline transparent ceramic

Title (de)

Verfahren zur Herstellung einer transparenten polykristallinen Keramik

Title (fr)

Procédé de fabrication d'une céramique transparente poly-cristalline

Publication

EP 2157065 A3 20111026 (DE)

Application

EP 09010199 A 20090807

Priority

DE 102008037037 A 20080808

Abstract (en)

[origin: EP2157065A2] Method for producing a transparent polycrystalline ceramic, comprises press forming and sintering a mixture of ceramic powder in FAST (field assisted sintering technology)-press in a single press cycle, where an unpulsed direct current (DC) voltage is applied to stampers and extrusion die of FAST press during the pressing cycle, and the pressing cycle is performed in consecutive temperature stages with different heating rates.

IPC 8 full level

C04B 35/44 (2006.01); C04B 35/443 (2006.01); C04B 35/645 (2006.01)

CPC (source: EP)

C04B 35/443 (2013.01); C04B 35/645 (2013.01); C04B 35/6455 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/549 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/661 (2013.01); C04B 2235/666 (2013.01); C04B 2235/77 (2013.01); C04B 2235/785 (2013.01); C04B 2235/80 (2013.01); C04B 2235/96 (2013.01); C04B 2235/9653 (2013.01)

Citation (search report)

  • [X] EP 1557402 A2 20050727 - FRAUNHOFER GES FORSCHUNG [DE]
  • [X] EP 1443032 A1 20040804 - SANDVIK AB [SE]
  • [X] NAUM FRAGE ET AL: "Spark plasma sintering (SPS) of transparent magnesium-aluminate spinel", JOURNAL OF MATERIALS SCIENCE, KLUWER ACADEMIC PUBLISHERS, BO, vol. 42, no. 9, 7 April 2007 (2007-04-07), pages 3273 - 3275, XP019503574, ISSN: 1573-4803, DOI: 10.1007/S10853-007-1672-0
  • [T] WIKIPEDIA CONTRIBUTORS: "Hot Pressing", 7 July 2009 (2009-07-07), Wikipedia, The Free Encyclopedia., XP002658396, Retrieved from the Internet <URL:http://en.wikipedia.org/wiki/Hot_pressing>

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2157065 A2 20100224; EP 2157065 A3 20111026; EP 2157065 B1 20140122; DE 102008037037 A1 20100211

DOCDB simple family (application)

EP 09010199 A 20090807; DE 102008037037 A 20080808